So I have an evo that is unrevoked and running 2.1. I want to upgrade to 2.2 and I understand that I have to download the file and rename it to update.zip and do a recovery boot. But after I download OTA I cant find the freaking file to rename it. Its not on my sdcard or on the phone. I used astro File manager to look. And I cant find anywhere to download it. PLEASE HELP!!!